Heartiness is the quality of being vigorous, enthusiastic, and wholehearted. When you greet someone with heartiness, you shake their hand firmly, smile warmly, and show genuine happiness to see them. When you eat with heartiness, you dig in with real appetite and enjoyment, not picking at your food halfheartedly.

The word captures a kind of robust enthusiasm and full commitment. A coach might praise the heartiness of the team's effort during practice, meaning they gave it everything they had. When someone laughs with heartiness, they laugh loudly and genuinely, not politely or timidly.

Heartiness can also describe physical strength and health. A hearty meal is substantial and satisfying, the kind that sticks to your ribs and gives you energy for the day ahead. A hearty person is strong, healthy, and full of energy.

The word suggests authenticity and completeness. There's nothing fake or half-measured about heartiness. When you do something with heartiness, you throw yourself into it completely, whether that's greeting an old friend, tackling a challenging project, or enjoying a good meal after a long day of hard work.